COMPASS
About 7909 78th Avenue Se
Exceptional South Mercer Island living with Lake Washington and Mount Rainier views. Set on an expansive 23,000+ square foot lot, this impressive 9,340-square-foot residence offers remarkable scale, privacy and resort-style amenities designed for both everyday living and unforgettable entertaining. Generous gathering spaces flow throughout the home, while walls of windows capture beautiful views. Enjoy year-round recreation with an indoor swimming pool and private sport court—creating your own retreat without leaving home. Multiple indoor and outdoor entertaining areas provide space to host on any scale, from relaxed gatherings to special celebrations. A separate guest apartment above the garage offers exceptional flexibility for guests, au pair, home office or additional living space. Ideally located on the south end of Mercer Island with convenient access to shopping, dining, parks and highly regarded Mercer Island schools. A rare combination of views, space, recreation and convenience in one extraordinary island property.
Open House
Features of 7909 78th Avenue Se
| MLS® # | 2580194 |
|---|---|
| Price | $6,800,000 |
| Bedrooms | 6 |
| Bathrooms | 8.50 |
| Full Baths | 4 |
| Half Baths | 3 |
| Square Footage | 9,340 |
| Acres | 0.54 |
| Year Built | 1996 |
| Type | Residential |
| Sub-Type | Single Family Residence |
| Status | Active |
Community Information
| Address | 7909 78th Avenue Se |
|---|---|
| Area | 510 - Mercer Island |
| Subdivision | Mercer Island |
| City | Mercer Island |
| County | King |
| State | WA |
| Zip Code | 98040 |
Amenities
| Parking Spaces | 4 |
|---|---|
| Parking | Attached Garage |
| View | Lake, Mountains, Territorial |
| Is Waterfront | No |
Interior
| Interior Features | Second Kitchen, Bath Off Primary, Built-In Vacuum, Dbl Pane/Storm Window, Fireplace, Fireplace (Primary Bedroom), High Tech Cabling, Hot Tub/Spa, Indoor Pool, Jetted Tub, Pantry, Sauna, Security System, Sprinkler System, Vaulted Ceiling(s), Walk-In Closet(s), Water Heater, Wet Bar, Wine Cellar, Wine/Beverage Refrigerator, Wired for Generator |
|---|---|
| Appliances | Dishwasher, Disposal, Dryer, Microwave, Refrigerator, Stove(s)/Range(s), Washer |
| Heating | 90%+ High Efficiency, Forced Air, Heat Pump |
| Cooling | 90%+ High Efficiency, Central Air |
| Fireplace | Yes |
| # of Fireplaces | 2 |
| Fireplaces | Gas |
Exterior
| Exterior Features | Stone, Stucco |
|---|---|
| Lot Description | Dead End Street, Paved |
| Foundation | Poured Concrete |
School Information
| District | Mercer Island |
|---|---|
| Elementary | Lakeridge Elem |
| Middle | Islander Mid |
| High | Mercer Isl High |
Additional Information
| Date Listed | September 11th, 2026 |
|---|---|
| Days on Market | 27 |
| Foreclosure | No |
| Short Sale | No |
| RE / Bank Owned | No |
Listing Details
| Office | COMPASS |
|---|